Sealing disc with an oxygen absorbing substance

Abstract

The invention relates to a sealing disk for openings of containers, comprising a metal layer used to inject heat by induction, a layer which can be sealed on the container opening and which can be melted by thermal conduction via the metal layer. The sealable layer is adjacent to the inside of the container when the sealing disk is placed on the container opening. An absorber layer which can extract and/or absorb oxygen from the fluid is provided such that said absorber layer is in contact with the inside of the container when the sealing disk is placed on the container opening.

1 . Sealing disc for container openings of container, comprising:
 an electrically conductive layer suitable for introducing heat by induction,   a sealable layer, which can be melted on by heat conduction from the electrically conductive layer and can be sealed on the container opening,   wherein the sealable layer is adjacent to the container interior of the container when the sealing disc is placed on the container opening, and   an absorber layer which can remove and/or absorb oxygen from a filling material located in the container interior   wherein the absorber layer connects with the container interior when the sealing disc is placed on the container opening.   
   
   
       2 . Sealing disc according to  claim 1 , characterised in that starting from the container opening the sealing disc has, one on top of the other, the sealable layer,
 on top of that the electrically conductive layer suitable for introducing heat by induction, and   on top of that the absorber layer absorbing oxygen from a filling material located in the container interior,   wherein perforations, which lead to the absorber layer, are directed through the sealable layer and the electrically conductive layer.   
   
   
       3 . Sealing disc according to  claim 2 , characterised in that the oxygen-removing absorber layer is covered to the top by an oxygen barrier layer. 
   
   
       4 . Sealing disc according to  claim 1 , characterised in that the sealable layer sealable on the container opening has oxygen-absorbing sections and/or oxygen-removing and/or absorbing properties, so that the sealable layer and the absorber layer are one and the same layer. 
   
   
       5 . Sealing disc according to  claim 4 , characterised in that starting from the container mouth, the sealable layer sealable on the container opening has a continuously or discontinuously increasing proportion of oxygen-absorbing sections and/or proportion having oxygen-absorbing properties. 
   
   
       6 . Sealing disc according to  claim 5 , characterised in that the proportion of the oxygen-absorbing sections and/or the material components having oxygen-absorbing properties increases from a proportion amounting to between 0% and 3% to a proportion amounting to between 5% and 20%. 
   
   
       7 . Sealing disc according to  claim 1 , characterised in that starting from the container opening, the sealing disc firstly has the sealable layer sealable on the container opening, then an oxygen-absorbing and/or removing absorber layer and
 on top of this the electrically conductive layer suitable for introducing heat by induction, and   that the sealable layer sealable on the container opening is permeable to the fluid in the container interior and/or to oxygen.   
   
   
       8 . Sealing disc according to  claim 1 , characterised in that the electrically conductive layer suitable for introducing heat by induction is a metal layer. 
   
   
       9 . Sealing disc according to  claim 8 , characterised in that the metal layer is an aluminum layer. 
   
   
       10 . Sealing disc according to  claim 1 , characterised in that sodium sulphite, an iron-containing material or a material which can be activated by ultraviolet light, is used as the oxygen-removing or -absorbing substance. 
   
   
       11 . Sealing disc according to  claim 8 , characterised in that starting from the container opening the sealing disc has, one on top of the other, the sealable layer,
 on top of that the electrically conductive layer suitable for introducing heat by induction, and   on top of that the absorber layer absorbing oxygen from a filling material located in the container interior,   wherein perforations, which lead to the absorber layer, are directed through the sealable layer and the electrically conductive layer.   
   
   
       12 . Sealing disc according to  claim 8 , characterised in that the oxygen-removing absorber layer is covered to the top by an oxygen barrier layer. 
   
   
       13 . Sealing disc according to  claim 8 , characterised in that the sealable layer sealable on the container opening has oxygen-absorbing sections and/or oxygen-removing and/or absorbing properties, so that the sealable layer and the absorber layer are one and the same layer. 
   
   
       14 . Sealing disc according to  claim 8 , characterised in that starting from the container mouth, the sealable layer sealable on the container opening has a continuously or discontinuously increasing proportion of oxygen-absorbing sections and/or proportion having oxygen-absorbing properties. 
   
   
       15 . Sealing disc according to  claim 8 , characterised in that the proportion of the oxygen-absorbing sections and/or the material components having oxygen-absorbing properties increases from a proportion amounting to between 0% and 3% to a proportion amounting to between 5% and 20%. 
   
   
       16 . Sealing disc according to  claim 1 , characterised in that starting from the container opening, the sealing disc firstly has the sealable layer sealable on the container opening, then an oxygen-absorbing and/or removing absorber layer and
 on top of this the electrically conductive layer suitable for introducing heat by induction, and   that the sealable layer sealable on the container opening is permeable to the fluid in the container interior and/or to oxygen.   
   
   
       17 . Sealing disc according to  claim 10 , characterised in that starting from the container opening the sealing disc has, one on top of the other, the sealable layer,
 on top of that the electrically conductive layer suitable for introducing heat by induction, and   on top of that the absorber layer absorbing oxygen from a filling material located in the container interior,   wherein perforations, which lead to the absorber layer, are directed through the sealable layer and the electrically conductive layer.   
   
   
       18 . Sealing disc according to  claim 10 , characterised in that the sealable layer sealable on the container opening has oxygen-absorbing sections and/or oxygen-removing and/or absorbing properties, so that the sealable layer and the absorber layer are one and the same layer. 
   
   
       19 . Sealing disc according to  claim 10 , characterised in that starting from the container mouth, the sealable layer sealable on the container opening has a continuously or discontinuously increasing proportion of oxygen-absorbing sections and/or proportion having oxygen-absorbing properties. 
   
   
       20 . Sealing disc according to  claim 1 , characterised in that starting from the container opening, the sealing disc firstly has the sealable layer sealable on the container opening, then an oxygen-absorbing and/or removing absorber layer and
 on top of this the electrically conductive layer suitable for introducing heat by induction, and   that the sealable layer sealable on the container opening is permeable to the fluid in the container interior and/or to oxygen.